Harrow



H. STONE HARROW April 22, 1930.

Filed April 6, 1929 2 Sheets-Sheet l INVENTOR. f/ rmn 622 72/6 ATTORNEY.

April 22, 1930.

H. STONE HARROW 2 Sheets-Sheet 2 Filed April 6, 1929 v INVENTOR; l77mm 675;?3

" v ATTORNEY.

Patented Ape 22, 1%39 I 1 ,rmrr ares PAT NT OFFICE a Q i i s rens, or eRnnLnYfcoIloRAno v it I I HARE-W a i y V Application filed April 6, i929. 1\To. 353,0 86. l The invention relates to revolving harrows, theprecise embodiment of the inventionmay and has for it's object' to providea deviceof be made within the, scope of what is claimed a this character comprising. a rectangular Without departing from the spirit of the'inshaped frame havinggmeansln connection vention; r v I a therewith for raising and'lowering the-frame i Inthedrawings: V 55 in relationto the ground and'rotatable menr Figure 1 is a top dlan view of the harr-ow. hers having outwardly.fextending cultivating Figure 2 is a side elevation of the harrow. arms adapted to pierce and dig into the Figure 3,is'a vertical transverse sectional ground as the device moves .over the ground, view on an enlarged scale, taken on line 3+3 for harrowing the same. of Figure 1. i ()Q l A further object is to stagger the teeth of Figure 4.- 1s an end View of oneof the rotor the rotatable niemhers in flrelation to eachelements. V I other, "thereby insuring the cultivation :of F igure 5 is a perspective iew of oneof; the ground over which theharr-ow passes. therotary elements A further object is to form-the rotatable Figure 6 s perspective View of as quare members 'Erom'a plurality of hubs having" shaft. I 7 v T luv and recess interengagement and the' Referring to the'drawings, thenumeral 1" hubs ith outwardly curved-ground pier0- designates a horizontally disposed frame in ing members, preferably formed integral which are-rockably mounted adjacent its therewith. Also to provide the shafts with ends, Frock shafts 2 and 3. Secured to the 7o 7 an a ' sleeves having lug interengagement, 'and'also endsof the shafts 2 and 3 tothe outside of the recess interengagement with the adjacent frame 1 are levers 4, the arms 5 ofwhich exhubs for locking the sleeves and hubs to. the tenddownwardly and terminate in horizontal shafts. v I I portions 6, to Y which conventional caste-r A. further object is to provide the hubs with wheels 7 are pivotally connected, and it will 75 squareaperturesextending through the same be .seenthat when the wheelsflare moved and to mount the hubs on a round shaft, downwardly to the positions shown inFigure thereby obviating-the boring oridr illing op- 2, the frame land parts carried'thereby will oration for a round hole throughthe hubs be elevated in relation to theg'round so that j 5 and allowing thehubs and their digging elethe device Wlll not harrow the ground,'for 3e cents to be utilized on squareshafts' if deinstance when movmg the harrow from place sired. r V I a to. place. Pivotallyconnected at 8 to the up- A further object is to provide the device per endsofthe levers t are connecting rods '9 g with a seed box and to provide driving con for insuring a simultane s mOVBm I f th a nections between one of the shafts and the' levers during. the'raising or'lowering Ope 35 451 raising or lowerin round engaging Wheels. rowing 'elementswill pierce the ground, and

' operating shaft of the seed box whereby said tion. 011s of the leverst is provided with an operating shaft will'be rotated as the device upwardly extending handle 10 having agrlp moves o'ver'thje ground.- member 11 to, hich-is connectedaoonnect A further object is to provide rock shafts ing rod 12fwhieh eontrolsa conventional dog at, the ends of the frame having levers secured 13, which in turn cooperates with a toothed 9o thereto and link connections between said segment 14: for holding'the levers in adjusted *levers at opposite sides of the frames and positions. When thedevice is in use, the

forming means whereby upon rocking of one handle meniberl0is manipulated for lower- 7 of the. shafts the other will he rockedfor ingthe frame 1 tea-posit onwhere the har- -With the above aild other objects in view itwill be seen by adjusting the handle memthe invention resides in the combination and ber lO the depth ofthe piercingma'y be reguarrangement of partsas hereinafter set forth, lated according. to the natureof the ground.- shewn' in the drawings, described and "he-device may be moved.overthe ground claimed, it being understood that changesin anyveonventionalmeans, tractor oifother -00,

wise, however for purposes of illustration, animal draft means is shown.

Rotatably mounted in bearings 16 of the frame 1 are transverse shafts 17, which shafts are preferably round as shown in Figure l, and mounted on said shafts are digging elements 18. The digging elements 18 comprise hub members 19, preferably provided with square apertures therethrough for the reception of the shaft, and at the same time allowing the digging elements to be applied to square shafts if desired. Oneof the ends of the hubs 19 is provided with recesses 20 for the reception of the lugs 21 carried by the adjacent ends of adjacent hubs, thereby forming" an interengaging connection between the hubs whereby they are locked to rotate together,

but in a manner whereby they may be easily disassembled for repalr purposes, for instance when one of the curved diggn'ig elements 22 is broken or damaged, therefore replacement cost is reduced to a-mmimum. In the case of the central s'haft17, the hub 1am; one end thereof, has a pin connection 23 to the shaft, thereby insuring, through this single connection, the positive rotation ofall of the digging elements with the shaft on which they are mounted.

The end shafts 17 have secured thereto by means of pins 24 sleeves 25 and 26. The sleeves 25 are provided with lugs 27 which engage in the recesses 20 of the adjacent hub 19 and the sleeves 26, with'recesses 28 which receive the lugs 21 of the adjacent hub, therefore it will be seen that all of the digging elements are detachably locked together for insuring simultaneous rotation, are interchangeable and are locked for rotation with their shafts, therefore it will be'seen that there will be a uniform harrowing of the around as the device moves over the same.

This is further insured by having the arms 7 22 of the ad acent harrowing elements on the ad acent shafts 1n staggered relation as clearly shown Figure 1.

If desired a conventional form of seed box may be used where it is desiredto deposit seed during the harrowing operation; The seed box is designated by the numeral 29, and is r'ovided with an operating shaft 30 extend ing outwardly from one :side thereof andprovided with a drive sprocket .31 over which a [sprocket chain 32'extends, and which sprocket chain extends over a sprocl: 33 carried by one e1'1dofone of the shafts 17, therefore it will be. seen thatfas the shaft I YrOtat'esincL (lent to the device bein moved over. the ground, rotation will be imparted to the seed box shaft :30 for operating thesame. yThe digger arms 22 preferably taper ground, and preferably curved inithe direc tent a digging operation.

From the above it will be seen that a har- 7 row is provided wherein a plurality of digging elements mounted on hubs are used and which digging elements are provided with interengaging means betweenthe hubs for insuring a simultaneous rotation, and with means cooperating with the shafts on which they aremou'nted for insuring a positive rotation of the digging elements with the shafts. By insuring this positive rotation with the shafts, it is obvious the square apertures through the hubs will not be worn out of rectangular form, consequently the elements will he received in a square shaft as shown in Figure'fi, if desired. lVherethe square shaft is used, the ends thereof, which are designated by the numeral 25, are cylindrical for rotation in the bearings 15 of the frame 1. The square shaft is'designatedjby the nu moral 34 V. j I

The invention having been set forth what is claimed: as new anduseful is:

A harrow comprisingaframe, transverse rock shafts within the frame at opposite ends thereof, levers mounted on said shafts intermediate theends of the levers androtatable therewith, caster wheels carried bythe lower ends of said levers, link connections between the upper ends of the levers above their pivotal points, a handle member carried by one of said levers andformmg meansfor s1multaneously rocking all of the levers and rotatable separable interengaged toothed dig-' ging elements carried by the frame- In testimony whereof he hereunto affixes his signature.- 7

' HERMAN STONE.

V I v to a point i 34 for insuring'a' positive piercing of the- 

